IP屬地:上海
概念 JVM在解釋執(zhí)行字節(jié)碼的過(guò)程中會(huì)收集代碼塊或方法的執(zhí)行頻率用于判斷該代碼塊或方法是否為熱點(diǎn)代碼锰霜,如果被判定為熱點(diǎn)代碼則這些代碼在運(yùn)行時(shí)會(huì)被...
1、Shuffle流程 spark的shuffle過(guò)程如下圖所示桐早,和mapreduce中的類似,但在spark2.0及之后的版本中只存在Sort...
Task Locality Data locality can have a major impact on the performance o...
概念 A stage is a set of parallel tasks ① all computing the same function ...
Job spark中對(duì)RDD的操作類型分為transformation和action癣缅,其中transformation是一種延遲執(zhí)行的操作,并不...